Calendar



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CALENDAR. APPLICATION FILED MAH-10V, 192|.

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T FFHC@ CALENDAR.

Specification of Letters Patent. y

Patented May 23, 1922.

Application filed March 10, 1921. Serial No. 451,232.

To all 'Lo/tom t may concern.'

Be it known that I, `SIMrsoN THOMAS, a citizen of the United States, residing at Southampton, in the county of Suffolk and State of New York, have invented certain new and useful improvements in Calendars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make Iand use the same.

This invention relates to improvements in calendars, and more particularly to the type commonly known as perpetual.

Among the objects in vlew are ease of operation, accuracy in results), compactness in form, and capacity for calculation of dates past or future.

`With these and further. objects in View, as will in part `hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinationsand arrangements of parts as sub sequently specified and claimed.

In the accompanying drawings,-

Figure l is a view in side elevation of a calendar embodying the features of the present invention, the parts being shown on a magnified scale.

Figure 2 is a side elevation of the rotary disc detached.

Figure 3 is a view similar to Figure l illustrating the opposite side.

Figure 4 is a view similar to Figure 2 illustrating` the opposite side.

Figure 5 is a vertical section taken on theplane indicated by line 5 5 of Figure 3.

Figure 6 Ais a fragmentary, det-ail view taken on the plane indicated by line 6 6 of Figure l.

It is one of the primary objects of the present invention to arrange a construction enabling such conipactness of parts as will make possible the production of a perpetual calendar in a square area approximately equal to that occupied by the average postage stamp, and, `in fact, may be made smaller if desired. Somewhat greater thickness than a stamp is unavoidable from the use of a plurality of sheets or plates, but the finished article is very small and compact, and is easily carried in a small compartment of a pocketbook. This is accomplished by virtue of the construction hereinafter described in detail, which enables Vsuch reduced size without sacrifice of clearness of the showing of the 'numbers and of the month and clay indicia. f

Referring to the drawings by numerals, l indicates a disc which is rotatably mounted between covering plates 2 and 3, any appropriate form of pivot being employed, such as a rivet 12 foi` holding the parts `l, 2 and 3 in their given positions. The disc l and cover plates 2 and 3 may be made of celluloid, aluminum, paper, or like appropriate thin sheet material. YOn the exposed face of plate 2 there is arranged a chart 4, which Will be herein referred to as the years chart, and is made up of seven columns of numbers. These columns are preferably bordered by confining parallel lines 5, 5, which extend to the upper edge of the plate 2, said upper edge having a specially designed contour as hereinafter` described, and

the upper portions `of lines 5 conforming thereto. The several columns of numbers of the years chart 4 designate the respective years which their numerical value indicate as representing the two final figures of an annual date, as, for example, the number04 might represent the date 304, or 1904, or 3904, and so on, and to designate the first figures of the number a centuries chart 6 is provided on plate 2. It will benoted that in the column of the centuries chart of plate 2 there appear the numbers 3, 7, ll, l5, etc., increasing or decreasing in the arithmetical progression represented by the common difference of four. Any one of the numbersof chart 6 taken with any one of the numbers of chart 4 will make upa century, as, forexample, if the user were endeavoring toflnd the year 1921, he would observe "the 19V in chart 6, and then seek out the column of chart 4 bearing the number 2l, which `happens to be the ,first column on the left. Therefore, the first column on the left would, for purposes of manipulation of the calendar, be the column for the year 1921, and this column may, for convenience, be identified as the index column ot' the particular manipulation of the calendar to be carried out. i

That face ot' disc 1 exposed toward plate 2, as best seen in Figure 2, is provided lwith twenty-eight equal, `segment-like sub-divisions, forming a months chart 7. 1n certain of the sub-divisions ot this chart appear the names of the months spacedin such relation to each other as to etiectively co-operate with respect to the columns or' chart 4, according to the index column selected, and also according to the arrangement of the weeks chart hereinafter mentioned.

The opposite tace ot' the disc 1, as best seen in Figure 4, is divided into twenty-eight similar sub-divisions, forming the weeks chart 8, bearing indicia ot the seven days of the week repeated four times, the arrangement of the names of the month in the subdivisions of chart 7 bearing the indicia of the seven days di the week repeated four times, the arrangement ot' the names of the month in the sub-divisions of chart 7 bearing the proper relation mechanically with respect to the arrangement of the indicia of the days in the chart 8 for effecting the results hereinafter pointed out.

The disc 1 is of such a size with respect to the plates 2 and 3 that it no portion of the edge of either of these plates were cut away, the disc would be concealed. A Theretore, the upper plate 2 is cut away at 9 to expose a marginal area of disc 1, including a number ot segments ot chart 7 equal to the number ot columns oi chart 4. As there are several columns otl chart 4, there are seven sub-divisions ot chart 7 exposed through the notch or cut away portion 9, and the lines 5 at their upper end portions are shaped to cause the upper' ends ot the columns of chart 4 to register' as perfectly as structurally possible with the lower ends ot the segmental sub-divisions of chart 7.

The plate 3 is cut away at 10, similarly to cut away portion 9, but at the opposite edge portion from that at which plate 2 is cut away, asindicated by the dotted lines in Figure 1. The cutaway portion 10 is arcuate, similarly to cut away portion 9, and exposes a similar portion of the disc 1 on which is seen seven of thc sub-divisions ot chart S exposed through cut away portion 10.

On the exposed tace of plate 3 is arranged the days chart 11, consisting of seven columns of figures, running from 1 to 31, and arranged after the manner of the figures on an ordinary calendar for one month of thirty-one days. The columns of figures of the days chart 11 are preferably bordered by confining lines 13, 13, which extend up- 'diminsh in arithmetical progression represented by a common difference of four, it will require four centuries charts to make up a complete perpetual calendar, and, as the years chart Inust be made up carefully to correspond with the centuries chart, I have provided three additional plates, designated at 2, and each identical with plate 2 in being provided With a century chart 6 and a years chart 4, similarly arranged V'for their mechanical relation with respect to the months chart 7. Since only one of the charts 2 or 2 may be used at a time, for facility of use and easy accessibility, the several plates 2 are pivoted at 14 to the plates 2 and 3, which Y latter plates together with the discl and the connecting pivotl 12 may beconsidered the body of the calendar. Thus, when the three plates 2 are swung down from the body of the calendar, the manipulations of the calendar may be carried out with respect to any century indicated by the numbers on the centuries chart 6 or any other century bearing the required relation in arithmetical progression as indicated. Vhen a manipulation of the calendar is desired with respect to any other century that one of plates 2 must be selected which bears the centuries chart 6 containing the number indicating the century in question, or which under the fixed rule of arithmetical progression above named might be included in such chart. W hen that plate 2 has vbeen selected, it is swung upon its pivot 14 up to a position exactly in register with the plate 2 and the disc 1 is manipulated exactly the same as with respect to plate 2, as will be hereinafter described. As it is probable that Amost users will be mostly interested in calculations relative to the twentieth century, the plate 2 has been caused to bear that centuries chart 6 including the number 19, which designates the last year ot' the nineteenth century and all but the last year of the twentieth century. In case the user should nd no particular use for the plates 2', the pivot 14 is made detachable so that the plates 2 may be readily removed and the calendar used without them. In this instance, however, the extent of use will be proportionately curtailed and the structure will not for the time Vbeing be actually a perpetual calendar.

It is to be observed that the centuries chart may be arranged at any appropriate point or along the border ot' its plate 2 or 2 in any desired manner, and as the years chart is made up of carefully selected and arranged Centuries Years chart. chart. 00 01 02 03 04 04 05 06 O7 08 08 09 3 10 11 12 12 13 14 15 16 16 17 18 19 2O 2O 7 21 22 23 24 24 25 26 27 28 28 29 30 31 32 11 32 33 34 35 36 36 37 38 39 40 40 41 42 43 15 44 44 45 46 47 48 48 49 50 5l 52 52 53 54 19 56 56 57 58 59 60 61 62 63 64 64 65 23 66 67 68 68 69 70 71 72 72 73 74 75 76 76 27 77 78 79 80 80 81 82 83 84 84 85 86 87 88 31 88 89 90 91 92 92 93 94 95 96 96 97 98 99 35 etc.

Centuries Years chart. chart.

0() 01 02 03 04 04 05 06 1 O7 08 08 09 10 11 12 12 13 14 15 16 16 17 5 18 19 20 2O 21 22 23 24 24 25 26 27 28 28 9 Y 29 30 31 32 32 33 34 etc.

Of the foregoing centuries charts and years charts, the rst corresponds With that appearing on plate 2, the second corresponds with that appearing on the intermediate plate of the three plates 2, the third corresponds with that appearing on the outermost plate 2', and the fourth corresponds with that appearing on the innermost plate 2.

In operating the calendar, assuming that the operator Wishes to find out on What day columns of figures usable only With respect to a fixed centuries chart, the respective centuries charts and the years charts are listed as follows:

Centuries Years chart. chart. 00 00 01 02 03 04 04 0 05 06 O7 08 08 09 10 11 12 12 13 14 15 16 4 16 17 18 19 20 20 21 22 23 24 24 25 26 27 8 28 28 29 30 31 32 32 33 34 35 36 36 37 38 12 39 40 40 41 42 43 44 44 45 46 47 48 48 49 16 50 51 52 52 53 54 55 56 56 57 58 59 60 60 2O 61 62 63 64 64 65 66 67 68 68 69 70 71 72 24 '72 73 74 75 76 76 77 78 79 80 80 81 82 83 28 84 84 85 86 87 88 88 89 90 91 92 92 93 94 32 96 96 97 98 99 etc.

Centuries Years chart. chart.

00 O1 02 2- 03 04 04 05 06 O7 08 08 09 10 11 12 12 13 6 14 15 16 16 17 18 19 20 20 21 22 23 -24 24 10 25 26 27 28 28 29 30 31 32 32 33 34 35 36 14 36 37 38 39 40 40 41 42 43 44 44 45 46 47 18 48 48 49 50 51 52 52 53 54 55 56 56 57 58 22 59 60 60 61 62 63 64 64 65 66 67 68 68 69 26 70 71 72 72 73 74 75 '76 76 77 78 79 8O 80 30 81 82 83 84 84 85 86 87 88 88 89 90 91 92 34 92 93 94 95 96 96 97 98 99 38 etc.

of the Week December 27, 2355, will fall, 20

the operator then locates the index column 25 of the years chart 4 by finding the number 55 which appears in the first column at the left. Therefore, the rst column at the left of the years chart is the index column for the years 2355, and the disc 1 is rotated until 30 the s ubdivis1on of the months chart bearing the indicia for the month Vof December is brought into position in line with the firstcolumn to the left of the years chart, as indicated in Fig. l. When the disc 1 has been brought to this position, the operator turns the calendar over and finds that that part of the weeks chart exposed through the cut away portion 10 ot plate 3 is properly located with respect to the columns oi the days chart l1 for reading after the manner of an ordinary calendar, except that the seven days represented by the seven divisions oi' the weeks chart exposed beOin with Thursday instead of Sunday. Otherwise, the calendar reads as thus set exactly as any ordinary calendar, and the operator will find that the 27th is indicated as Tuesday, so that the 27th of December, 2355, will occur on Tuesday. Any date may thus be arrived at by similar manipulations of the parts of the calendar as described.

Bold face figures in the years chart indi.- cate leap years and must be used for January and February only.

The centuries and years when read from the top down relate to the years after Christ, and for years before Christ it is only necessary to read the numbers in the reverse order or from the bottom upward.

In making calculations of dates prior to the production of our modern calendar, the changes from old calendar dates must be calculated independently and the difference taken into consideration in applying results obtained trom the use of the present improved calendar.

NVhat is claimed is l. A calendar comprising connected cover plates, and an interposed disc revolubly mounted between the cover plates, the edge of the disc being arranged to protrude beyond the cover plates at one point, and the cover plates being cut away -for exposing portions of the disc, the cut away portion of one cover plate being at a different edge from that ot the cut away portion of the other cover plate, the disc bearing at one face indicia of sub-divisions ot' time and at its opposite tace indicia of other sub-divisions of time, each solocated on its respective face as to be co-operatively exposed at the cut away portions, and the exposed faces of the cover plates bearing indicia or' other sub-divisions of time arranged to eo-operate with the indicia ot' the exposed portions of' the disc.

2. A calendar comprising connected cover plates, and an interposed disc revolubly mounted between the cover plates, the edge of the disc being arranged to protrude beyond the cover` plates at one point, and the cover plates being cut away for exposing portions of the disc, the disc bearing at one.

face about its peripheral portion indicia of a weeks chart and about its peripheralportionV days chart located and arranged to co-operate with the weeks chart of the disc.

3. A calendar comprising cover plates, and a rotating element pivotally mounted between said plates, the rotatin element being arranged to extend beyond er ge portions of the plates for exposing portions ot the faces ot the rotating element, the exposed portion oi the rotating element at one :tace being located remote from the exposed portion thereof at the other face, and the rotating element having only one exposed portion at each tace, each of the cover plates bearing on its exposed face indicia ot sub-divisions oit time and the rotating element bearing on each of its 'faces indicia of co-operating subdivisions oi time.

4L. A calendar comprising cover plates, and a movable element mounted between said plates, the movable element being arranged to extend beyond edge portions of the plates for exposing portions oi the faces ot the movable element, the exposed portion ot' the movable element at one face being located remote from the exposed portion thereof at the other face, and the movable ele-ment having only one exposed portion at each face., each of the cover plates bearing on its exposed face indicia of sub-divisions o't time, and the movable element bearing on each of its faces indicia. of co-operating sub-divisions ot' time.

5. A calendar comprising cover plates and a. disc rotatably mounted between the plates, an edge portion of each ot' the cover plates being cut away to expose an arc of the disc, the exposed portion of the disc at one face being located remote trom the exposed portion thereotl at the other face, and the disc having only one exposed portion at each face, the exposed face of each cover plate bearing indicia of sub-divisions of time and the faces of the disc bearing indicia` of subdivisions ot time co-operatively arranged with respect to each other and with respect to the indicia on the exposed faces of the cover plates.

6. A perpetual calendar comprising a movable. element, a cover plate at each iace thereof, and three additional cover plates movable to and from a position covering one of the first-mentioned cover plates, each of the tour thus co-operating cover plates bearing on its exposed face a years chart containing indicia of the co-operating numbers representing the years ot a century and also bearing corresponding indicia for the several centuries accurately represented by such chart, the movable element bearing indicia at that face exposed toward the years chart adapted to oo-operate therewith, and the cover plate at the opposite side of said movable element bearing a days chart and the movable element at that face exposed toward the cover plate having the days chart bearing indicia of sub-divisions of time adapted to co-operate with said days chart.

7. A perpetual calendar comprising a movable element, a cover plate at each face thereof, and three additional cover plates movable to and from a position covering one of the first-mentioned cover plates, each of the four thus co-operating cover plates bearing on its exposed face a years chart containing indicia of the co-operating numbers representing t-he years of a century and also bearing corresponding indicia for the several centuries accurately represented by such charts, the movable element bearing indicia at that face'exposed toward the years chart adapted to co-operate therewith, and the cover plate at the opposite side of said movable element bearing a days Chart, and the movable element at that face exposed toward the cover plate having the days chart hearing indicia of sub-divisions of time adapted to co-operate with said days chart, the three cover plates bea-ring years charts and movable relative to the first years ohart cover plate and being pivotally connected to the last-mentioned cover plate.

8. calendar comprising cover plates, and a disc rotatably mounted between the cover plates, the peripheral portion of one face of the disc bearing indicia. of a. weeks chart arranged in a circular area, the opposite face of the disc bearing indicia of a months chart in the same relative area, one of the cover plates having its exposed face bearing indicia of a days chart loca-ted to co-operate with the indicia of the weeks chart, and the other cover plate having its exposed face bearing indicia of a years chart located to co-operate with the mont-hs chart of the dise, the cover plates being constructed and arranged to expose portions only of the weeks chart and months chart adapted for any given time to cooperate with the days chart and the years chart.

9. A calendar comprising cover plates, and a rotating element pivotally mounted between said plates, the rotating element being arranged to have portions exposed beyond the cover plates, the exposed portion of the rotating element at one face being located diametrically opposite from the eX- posed portion thereof at the other face, and the rotating element having only one exposed portion at each face, each of the cover plates bearing on its exposed fac-e indicia of sub-divisions of time and the rotating element bearing on each of its faces indicia of cto-operating sub-divisions of time.

In testimony whereof I afiix my signature in presence of two witnesses.

SBIPSON THOMAS.

tnesses CHRISTIE H. FESLER, EDGAR M. KITCHIN. 

